APA (7th ed.) Citation

OJAKANGAS, R. W. (1976). The earth, past and present - Richard W. Ojakangas, David G. Darby. McGraw-Hill.

Chicago Style (17th ed.) Citation

OJAKANGAS, Richard W. The Earth, Past and Present - Richard W. Ojakangas, David G. Darby. McGraw-Hill, 1976.

MLA (8th ed.) Citation

OJAKANGAS, Richard W. The Earth, Past and Present - Richard W. Ojakangas, David G. Darby. McGraw-Hill, 1976.

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