Cita APA

Peter H Raven. (1995). Understanding biology. Dubuque, Iowa: WCB.C. Brown.

Chicago Style Citation

Peter H Raven. Understanding Biology. Dubuque, Iowa: WCB.C. Brown, 1995.

Cita MLA

Peter H Raven. Understanding Biology. Dubuque, Iowa: WCB.C. Brown, 1995.

Atenció: Aquestes cites poden no estar 100% correctes.