APA (7e ed.) Bronvermelding
Blough, G. O., & Schwartz, J. (1990). Elementary school science and how to teach it (8th ed.). Harcourt brace.
Chicago (17e ed.) Bronvermelding
Blough, Glenn O., en Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Philadelphia: Harcourt brace, 1990.
MLA (9e ed.) Bronvermelding
Blough, Glenn O., en Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Harcourt brace, 1990.
Let op: Deze citaties zijn niet altijd 100% accuraat.