Free, J. B. (1987). Pheromones of social bees.
Chicago Style aipamenaFree, John B. Pheromones of Social Bees. Chapman and Hall, London, 1987.
MLA aipamenaFree, John B. Pheromones of Social Bees. 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.