APA (7th ed.) Citation

Sharpley, H., & Howarth, H. E. (1929). A source book in astronomy / by H. Sharpley and H.E.Howarth. McGraw-Hill.

Chicago Style (17th ed.) Citation

Sharpley, H., and H. E. Howarth. A Source Book in Astronomy / by H. Sharpley and H.E.Howarth. McGraw-Hill, 1929.

MLA (9th ed.) Citation

Sharpley, H., and H. E. Howarth. A Source Book in Astronomy / by H. Sharpley and H.E.Howarth. McGraw-Hill, 1929.

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