APA引文

Obourn, E. S. (1963). Activities for the world of science. D. Van Nostrand.

Chicago Style (17th ed.) Citation

Obourn, Ellsworth Scott. Activities for the World of Science. Princeton, NJ: D. Van Nostrand, 1963.

MLA引文

Obourn, Ellsworth Scott. Activities for the World of Science. D. Van Nostrand, 1963.