APA (7th ed.) Citation

Gupta, P. P. (1985). Spherical Astronomy. Pragati Prakashan.

Chicago Style (17th ed.) Citation

Gupta, P. P. Spherical Astronomy. Meerut: Pragati Prakashan, 1985.

MLA (9th ed.) Citation

Gupta, P. P. Spherical Astronomy. Pragati Prakashan, 1985.