APA (7th ed.) Citation

Kopal, Z. (1946). An Introduction to the study of eclipsing. Harvard University Press.

Chicago Style (17th ed.) Citation

Kopal, Z. An Introduction to the Study of Eclipsing. Cambridge, Mass: Harvard University Press, 1946.

MLA (9th ed.) Citation

Kopal, Z. An Introduction to the Study of Eclipsing. Harvard University Press, 1946.