Avant, S. (2015). A touch of clay helps prevent fish disease. Agriculture.
Chicago Style aipamenaAvant, Sandra. "A Touch of Clay Helps Prevent Fish Disease." Agriculture 2015.
MLA aipamenaAvant, Sandra. "A Touch of Clay Helps Prevent Fish Disease." Agriculture, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.