Cita APA (7th ed.)

Aller, L. H. (1956). Gaseous nebulae. Chapman and Hall.

Cita Chicago (17th ed.)

Aller, Lawrence H. Gaseous Nebulae. 37 Essex Street, W.C.2: Chapman and Hall, 1956.

Cita MLA (9th ed.)

Aller, Lawrence H. Gaseous Nebulae. Chapman and Hall, 1956.