Cita APA

Simpson, S., & Bugna, S. (2001). Handbook for protected area rangers and field offciers. Department of Environment and Natural Resources.

Citación estilo Chicago

Simpson, Struan, and Sahlee Bugna. Handbook for Protected Area Rangers and Field Offciers. Quezon City: Department of Environment and Natural Resources, 2001.

Cita MLA

Simpson, Struan, and Sahlee Bugna. Handbook for Protected Area Rangers and Field Offciers. Department of Environment and Natural Resources, 2001.