Cita APA (7th ed.)

Bothun, G. (1998). Modern cosmological observations and problems. Taylor & Francis.

Cita Chicago (17th ed.)

Bothun, Greg. Modern Cosmological Observations and Problems. London: Taylor & Francis, 1998.

Cita MLA (9th ed.)

Bothun, Greg. Modern Cosmological Observations and Problems. Taylor & Francis, 1998.