Free, J. B. (1987). Pheromones of social bees.
Chicago Edition CitationFree, John B. Pheromones of Social Bees. Chapman and Hall, London, 1987.
MLA Edition CitationFree, John B. Pheromones of Social Bees. 1987.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.