Reproduction for honey bees must be considered on two levels, at the bee level and at colony level. The colony is a superorganism. Tom Seeley's work has ended in a greater understanding of the latter with the publication of several books.

This subject will be enlarged upon at a later date but if you wish to understand more the general books on Honey Bee anatomy and physiology are a good starting point.
Scientific Beekeeping
Anatomy & Physiology
Here we have many eggs being laid in a cell. However the eggs are being laid at the back of the cell (as we look at it) so it will probably be from a queen rather than a laying worker. Workers' abdomens are generally too short to lay at the bottom of the cell.

It is likely that this is a virgin queen or recently mated queen who has yet to find her rhythm.
Dave Stokes
Leinster Honey
On the right we can see swarm cells, in their normal position on the outer limits of the frame, in this instance at the bottom of the frame.
A Few Photos
In this image we see supersedure cells (please note the spelling of supersedure, no c). They are made by extending a cell which started as a worker cell. These cells are made when the bees sense there is something wrong with the queen (e.g. the beekeeper injuring the queen or the queen becoming a drone layer).
Here we have drone brood in worker cells. Drone eggs are unfertilised and come from either a laying worker, a virgin queen or an older queen that has run out of sperm.
An illustration of eggs laid by a laying worker. The eggs have been attached to the wall of the cell.
See also Bee Breeding
Queen and young larval pheromones impact nursing and reproductive physiology of honey bee (Apis mellifera) workers