APA (7th ed.) Citation

Walker, G. W. (1913). Modern seismology. Longmans.

Chicago Style (17th ed.) Citation

Walker, George Walker. Modern Seismology. London [etc.]: Longmans, 1913.

MLA (9th ed.) Citation

Walker, George Walker. Modern Seismology. Longmans, 1913.

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