APA (7th ed.) Citation
Parker, G. W. (1959). Elements of astronomy (4th ed.). Scientific book company.
Chicago Style (17th ed.) Citation
Parker, G. W. Elements of Astronomy. 4th ed. India: Scientific book company, 1959.
MLA (9th ed.) Citation
Parker, G. W. Elements of Astronomy. 4th ed. Scientific book company, 1959.
Warning: These citations may not always be 100% accurate.