APA ציטוט

Obourn, E. S. (1963). Teacher's guide for discovering the world of science. Van Nostrand.

Chicago Style (17th ed.) Citation

Obourn, Ellsworth Scott. Teacher's Guide for Discovering the World of Science. Princeton: Van Nostrand, 1963.

ציטוט MLA

Obourn, Ellsworth Scott. Teacher's Guide for Discovering the World of Science. Van Nostrand, 1963.