Gaya APA

Roe, D. et al (1997). Take only photographs, leave only footptints : the environmental impacts of wildlife tourism (No.10, October 1997). London: Environmental Planning Group International Institute for Environment and Development.

Gaya MLA

Roe, Dilys. et al. "Take only photographs, leave only footptints : the environmental impacts of wildlife tourism". No.10, October 1997 London: Environmental Planning Group International Institute for Environment and Development, 1997. BUKU.