APA (7th ed.) Citation

Howcroft, N., & Davidson, J. (1974). Papua New Guina tree introduction and improvement progress report 1972-1974. Dept. of Forests.

Chicago Style (17th ed.) Citation

Howcroft, N., and John Davidson. Papua New Guina Tree Introduction and Improvement Progress Report 1972-1974. Boroko: Dept. of Forests, 1974.

MLA (9th ed.) Citation

Howcroft, N., and John Davidson. Papua New Guina Tree Introduction and Improvement Progress Report 1972-1974. Dept. of Forests, 1974.