APA (7th ed.) Citation

Longyear, J. M. (1944). Archaeological investigations in El Salvador.

Chicago Style (17th ed.) Citation

Longyear, John Munro. Archaeological Investigations in El Salvador. Cambridge, Mass, 1944.

MLA (9th ed.) Citation

Longyear, John Munro. Archaeological Investigations in El Salvador. 1944.

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