Cita APA (7th ed.)

EISELEY, L. (1971). The firmament of time. Atheneum.

Cita Chicago (17th ed.)

EISELEY, L. The Firmament of Time. New York: Atheneum, 1971.

Cita MLA (9th ed.)

EISELEY, L. The Firmament of Time. Atheneum, 1971.