APA (7e ed.) Bronvermelding

Powis, R. (1985). The human body and why it works. Prentice-Hall.

Chicago (17e ed.) Bronvermelding

Powis, Raymond. The Human Body and Why It Works. Englewood Cliffs, New Jersey: Prentice-Hall, 1985.

MLA (9e ed.) Bronvermelding

Powis, Raymond. The Human Body and Why It Works. Prentice-Hall, 1985.