Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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