APA (7th ed.) Citation

IMPS Research, Pty. Ltd. (1990). PNG wells directory (2nd ed.). IMPS Research.

Chicago Style (17th ed.) Citation

IMPS Research, Pty. Ltd. PNG Wells Directory. 2nd ed. Port Moresby: IMPS Research, 1990.

MLA (9th ed.) Citation

IMPS Research, Pty. Ltd. PNG Wells Directory. 2nd ed. IMPS Research, 1990.

Warning: These citations may not always be 100% accurate.