APA (7th ed.) Citation

Hamid, S. E. (1969). Second-order planetary theory. Smithsonian Institution, Astrophysical Observatory.

Chicago Style (17th ed.) Citation

Hamid, S. E. Second-order Planetary Theory. Cambridge, Mass.: Smithsonian Institution, Astrophysical Observatory, 1969.

MLA (9th ed.) Citation

Hamid, S. E. Second-order Planetary Theory. Smithsonian Institution, Astrophysical Observatory, 1969.

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