Cita APA (7th ed.)

Clerke, A. M. (1903). Problems in astrophysics. A.&C. Black.

Cita Chicago (17th ed.)

Clerke, Agnes M. Problems in Astrophysics. London: A.&C. Black, 1903.

Cita MLA (8th ed.)

Clerke, Agnes M. Problems in Astrophysics. A.&C. Black, 1903.