APA (7th ed.) Citation

Barrett, D. (1971). Your future: A guide to careers in Papua New Guinea. D. Barrett.

Chicago Style (17th ed.) Citation

Barrett, Don. Your Future: A Guide to Careers in Papua New Guinea. Port Moresby: D. Barrett, 1971.

MLA (9th ed.) Citation

Barrett, Don. Your Future: A Guide to Careers in Papua New Guinea. D. Barrett, 1971.