APA (7th ed.) Citation

Christensen, J., & Densley, D. R. J. (1979). Oil palm. Dept. of Primary Industry.

Chicago Style (17th ed.) Citation

Christensen, J., and D. R. J. Densley. Oil Palm. [Port Moresby]: Dept. of Primary Industry, 1979.

MLA (9th ed.) Citation

Christensen, J., and D. R. J. Densley. Oil Palm. Dept. of Primary Industry, 1979.