APA (7th ed.) Citation

Simon, R. B. (1969). Earthquake interpretations (2. printing (revised).). Colorado School of Mines.

Chicago Style (17th ed.) Citation

Simon, Ruth B. Earthquake Interpretations. 2. printing (revised). (Golden, Colorado): Colorado School of Mines, 1969.

MLA (9th ed.) Citation

Simon, Ruth B. Earthquake Interpretations. 2. printing (revised). Colorado School of Mines, 1969.