APA (7th ed.) Citation

Papua New Guinea & Watt, I. R. (1977). Pigs. Dept. of Primary Industry.

Chicago Style (17th ed.) Citation

Papua New Guinea and I. R. Watt. Pigs. Port Moresby: Dept. of Primary Industry, 1977.

MLA (9th ed.) Citation

Papua New Guinea and I. R. Watt. Pigs. Dept. of Primary Industry, 1977.