एपीए उद्धरण

Bille, T. (1998). Eggs and hatchlings of the Mexican salamander Pseudoeurycea cephalica (Caudata: Plethodontidae).

शिकागो स्टाइल उद्धरण

Bille, Thomas. Eggs and Hatchlings of the Mexican Salamander Pseudoeurycea Cephalica (Caudata: Plethodontidae). 1998.

एमएलए उद्धरण

Bille, Thomas. Eggs and Hatchlings of the Mexican Salamander Pseudoeurycea Cephalica (Caudata: Plethodontidae). 1998.