Παραπομπή APA
Enger, E. D., & Smith, B. F. (2000). Field & laboratory exercises: In environmental science (7th ed.). Boston: McGraw Hill.
Παραπομπή Chicago StyleEnger, Eldon D., and Bradley Fraser Smith. Field & Laboratory Exercises: In Environmental Science. 7th ed. Boston: McGraw Hill, 2000.
Παραπομπή MLAEnger, Eldon D., and Bradley Fraser Smith. Field & Laboratory Exercises: In Environmental Science. 7th ed. Boston: McGraw Hill, 2000.
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