Citazione APA

Easa, P. S. A., & Jayson, E. A. A. (2004). A field guide to animal signs.

Stile di citazione Chicago

Easa, P S; Author, e E A; Author Jayson. A Field Guide to Animal Signs. Thrissur, Kerala Forest Research Institute, 2004.

Citazione MLA

Easa, P S; Author, e E A; Author Jayson. A Field Guide to Animal Signs. 2004.