Cita APA (7th ed.)

Enger, E. D., & Smith, B. F. (2019). Environmental science: A study of interrelationships (Fifteenth edition, International student edition.). McGraw-Hill Education.

Cita Chicago (17th ed.)

Enger, Eldon D., i Bradley F. Smith. Environmental Science: A Study of Interrelationships. Fifteenth edition, International student edition. New York, NY: McGraw-Hill Education, 2019.

Cita MLA (9th ed.)

Enger, Eldon D., i Bradley F. Smith. Environmental Science: A Study of Interrelationships. Fifteenth edition, International student edition. McGraw-Hill Education, 2019.