APA-Zitierstil (7. Ausg.)

Engel, M. S. (2001). A monograph of the Baltic amber bees and evolution of the Apoidea (Hymenoptera). American Museum of Natural History.

Chicago-Zitierstil (17. Ausg.)

Engel, Michael S. A Monograph of the Baltic Amber Bees and Evolution of the Apoidea (Hymenoptera). New York: American Museum of Natural History, 2001.

MLA-Zitierstil (9. Ausg.)

Engel, Michael S. A Monograph of the Baltic Amber Bees and Evolution of the Apoidea (Hymenoptera). American Museum of Natural History, 2001.