APA

Trefil J. S., . (1987). Meditations at sunset: a scientist looks at the sky. New York: Scribner.

Chicago

Trefil James S, . 1987. Meditations at sunset: a scientist looks at the sky. New York: Scribner.

Harvard

Trefil J. S., . (1987). Meditations at sunset: a scientist looks at the sky. New York: Scribner.

MLA

Trefil James S, . Meditations at sunset: a scientist looks at the sky. New York: Scribner. 1987.