APA-referens

Esau, K., Holt, R., & Winston. Biology studies: Vascular differenciation in plants.

Chicago-stil citat

Esau, Katherine, Rinehart Holt, och Winston. Biology Studies: Vascular Differenciation in Plants.

MLA-referens

Esau, Katherine, et al. Biology Studies: Vascular Differenciation in Plants.