Hartley, J., & Leakey, R. E. (2010). Africa's big five and other wildlife filmmakers: A centenary of wildlife filming in Kenya. Twaweza Communications.

Hartley, Jean, and Richard E. Leakey. Africa's Big Five and Other Wildlife Filmmakers: A Centenary of Wildlife Filming in Kenya. Nairobi, Kenya: Twaweza Communications, 2010.

Hartley, Jean, and Richard E. Leakey. Africa's Big Five and Other Wildlife Filmmakers: A Centenary of Wildlife Filming in Kenya. Twaweza Communications, 2010.