APA (7th ed.) Citation

National Library Service of Papua New Guinea. (1990). Papua New Guinea national bibliography, 1990 Part one. National Library Service of Papua New Guinea.

Chicago Style (17th ed.) Citation

National Library Service of Papua New Guinea. Papua New Guinea National Bibliography, 1990 Part One. Port Moresby: National Library Service of Papua New Guinea, 1990.

MLA (9th ed.) Citation

National Library Service of Papua New Guinea. Papua New Guinea National Bibliography, 1990 Part One. National Library Service of Papua New Guinea, 1990.