APA (7th ed.) Citation

Schaaf, F. (1990). Seeing the sky: 100 projects, activities, and explorations in astronomy. John Wiley.

Chicago Style (17th ed.) Citation

Schaaf, Fred. Seeing the Sky: 100 Projects, Activities, and Explorations in Astronomy. New York: John Wiley, 1990.

MLA (9th ed.) Citation

Schaaf, Fred. Seeing the Sky: 100 Projects, Activities, and Explorations in Astronomy. John Wiley, 1990.

Warning: These citations may not always be 100% accurate.