APA (7th ed.) Citation

Jones, A., & Duke, D. (2005). Ptolemy's planetary mean motions revisited.

Chicago Style (17th ed.) Citation

Jones, Alexander, and Dennis Duke. Ptolemy's Planetary Mean Motions Revisited. 2005.

MLA (9th ed.) Citation

Jones, Alexander, and Dennis Duke. Ptolemy's Planetary Mean Motions Revisited. 2005.

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