Culver, R. B., & Roberts, S. (1997). Laboratory exercises in introductory astronomy. Forth Worth, TX: Harcourt Brace.
शिकागो स्टाइल उद्धरणCulver, Roger B., और Sean Roberts. Laboratory Exercises in Introductory Astronomy. Forth Worth, TX: Harcourt Brace, 1997.
एमएलए उद्धरणCulver, Roger B., और Sean Roberts. Laboratory Exercises in Introductory Astronomy. Forth Worth, TX: Harcourt Brace, 1997.
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