APA (7th ed.) Citation

Gibson, D. L. (1977). Geology of the Crater 1: 100,000 sheet area. Geological Survey of Papua New Guinea.

Chicago Style (17th ed.) Citation

Gibson, D. L. Geology of the Crater 1: 100,000 Sheet Area. [Port Moresby]: Geological Survey of Papua New Guinea, 1977.

MLA (9th ed.) Citation

Gibson, D. L. Geology of the Crater 1: 100,000 Sheet Area. Geological Survey of Papua New Guinea, 1977.

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