Gaya APA

Andersen, H, O., Koutnik, P, G. (1972). Toward More Effective Science Instruction In Secondary Education (Ke- 1). : Macmillan Publishing.

Gaya MLA

Andersen, Hans, O.., Koutnik, Paul, G.. "Toward More Effective Science Instruction In Secondary Education". Ke- 1 : Macmillan Publishing, 1972. Text.