APA (7th ed.) Citation

Ripper, I. D. (1966). Seismograph calibrations, Port Moresby Geophysical Observatory, TPNG, 1958-1962. Bureau of Mineral Resources, Geology and Geophysics.

Chicago Style (17th ed.) Citation

Ripper, I. D. Seismograph Calibrations, Port Moresby Geophysical Observatory, TPNG, 1958-1962. [Canberra ]: Bureau of Mineral Resources, Geology and Geophysics, 1966.

MLA (9th ed.) Citation

Ripper, I. D. Seismograph Calibrations, Port Moresby Geophysical Observatory, TPNG, 1958-1962. Bureau of Mineral Resources, Geology and Geophysics, 1966.

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