APA (7th ed.) Citation

Heyden, F. J. (1976). A laboratory manual for undergraduate astronomy (Trial ed.). Ateneo de Manila University Press.

Chicago Style (17th ed.) Citation

Heyden, Francis J. A Laboratory Manual for Undergraduate Astronomy. Trial ed. Quezon City: Ateneo de Manila University Press, 1976.

MLA (9th ed.) Citation

Heyden, Francis J. A Laboratory Manual for Undergraduate Astronomy. Trial ed. Ateneo de Manila University Press, 1976.