Παραπομπή σε μορφή APA (7η εκδ.)

WALKER, R. (2005). Under the microscope the human body volume 1 heart: How the blood gets around the body. Grolier Educational.

Παραπομπή σε μορφή Chicago (17η εκδ.)

WALKER, Richard. Under the Microscope the Human Body Volume 1 Heart: How the Blood Gets Around the Body. Danbury: Grolier Educational, 2005.

Παραπομπή σε μορφή MLA (9th εκδ.)

WALKER, Richard. Under the Microscope the Human Body Volume 1 Heart: How the Blood Gets Around the Body. Grolier Educational, 2005.