Cita APA (7th ed.)

Masters, G. M., & Ela, W. (2014). Introduction to environmental engineering and science (Third edition, International edition.). Pearson Education Limited.

Cita Chicago (17th ed.)

Masters, Gilbert M., i Wendell Ela. Introduction to Environmental Engineering and Science. Third edition, International edition. England: Pearson Education Limited, 2014.

Cita MLA (9th ed.)

Masters, Gilbert M., i Wendell Ela. Introduction to Environmental Engineering and Science. Third edition, International edition. Pearson Education Limited, 2014.