APA (7th ed.) Citation

Lean, G. A. (1991). Counting systems of Papua New Guinea, volume 1: New Ireland Province (2nd ed.). PNG University of Technology.

Chicago Style (17th ed.) Citation

Lean, Glendon A. Counting Systems of Papua New Guinea, Volume 1: New Ireland Province. 2nd ed. Lae: PNG University of Technology, 1991.

MLA (9th ed.) Citation

Lean, Glendon A. Counting Systems of Papua New Guinea, Volume 1: New Ireland Province. 2nd ed. PNG University of Technology, 1991.