Cita APA

Hem, J. D. 1., & Hem, J. D. 1. (1975). Study and interpretation of the chemical characteristics of natural water (2. edition --.). Washington: U.S. Government Printing Office.

Citación estilo Chicago

Hem, John David 1916-, y John David 1916- Hem. Study and Interpretation of the Chemical Characteristics of Natural Water. 2. edition --. Washington: U.S. Government Printing Office, 1975.

Cita MLA

Hem, John David 1916-, y John David 1916- Hem. Study and Interpretation of the Chemical Characteristics of Natural Water. 2. edition --. Washington: U.S. Government Printing Office, 1975.