Cita APA (7th ed.)

Leatherwood, S., & Reeves, R. R. (1991). Marine mammal research and conservation in Sri Lanka 1985-1986 (2nd edition.). UNEP.

Cita Chicago (17th ed.)

Leatherwood, Stephen, i Randall R. Reeves. Marine Mammal Research and Conservation in Sri Lanka 1985-1986. 2nd edition. Narrobi, Kenya: UNEP, 1991.

Cita MLA (9th ed.)

Leatherwood, Stephen, i Randall R. Reeves. Marine Mammal Research and Conservation in Sri Lanka 1985-1986. 2nd edition. UNEP, 1991.