APA-ийн эшлэл(7 дахь хэвлэлт)

Blough, G. O., & Schwartz, J. (1990). Elementary school science and how to teach it (8th ed.). Harcourt brace.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Blough, Glenn O., ба Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Philadelphia: Harcourt brace, 1990.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Blough, Glenn O., ба Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Harcourt brace, 1990.