Burger, J., & Zappalorti, R. T. (2011). The northern pine snake (pituophis melanoleucus): Its life history, behavior and conservation. Nova Science Publishers.
Cita Chicago (17th ed.)Burger, Joanna, i Robert T. Zappalorti. The Northern Pine Snake (pituophis Melanoleucus): Its Life History, Behavior and Conservation. Hauppauge, N.Y.: Nova Science Publishers, 2011.
Cita MLA (9th ed.)Burger, Joanna, i Robert T. Zappalorti. The Northern Pine Snake (pituophis Melanoleucus): Its Life History, Behavior and Conservation. Nova Science Publishers, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.