APA引文

Obourn, E. S. (1958). Activities in science: Workbook to accompany science in everyday life (2nd edition.). D. Van Nostrand Co.

Chicago Style (17th ed.) Citation

Obourn, Ellsworth S. Activities in Science: Workbook to Accompany Science in Everyday Life. 2nd edition. Princeton, New Jersey: D. Van Nostrand Co, 1958.

MLA引文

Obourn, Ellsworth S. Activities in Science: Workbook to Accompany Science in Everyday Life. 2nd edition. D. Van Nostrand Co, 1958.