APA (7th ed.) Citation

Papua New Guinea. Dept. of Primary Industry. (1977). Sweet potato (Rev. ed.). Dept. of Primary Industry.

Chicago Style (17th ed.) Citation

Papua New Guinea. Dept. of Primary Industry. Sweet Potato. Rev. ed. Port Moresby: Dept. of Primary Industry, 1977.

MLA (9th ed.) Citation

Papua New Guinea. Dept. of Primary Industry. Sweet Potato. Rev. ed. Dept. of Primary Industry, 1977.