Gaya APA

Koestler, Arthur. (1954). The Invisible writing : an autobiography / Arthur Koestler . Boston: Beacon.

Gaya Chicago

Koestler, Arthur. The Invisible writing : an autobiography / Arthur Koestler. Boston: Beacon, 1954. .

Gaya MLA

Koestler, Arthur. The Invisible writing : an autobiography / Arthur Koestler. Boston: Beacon, 1954. .

Gaya Turabian

Koestler, Arthur. The Invisible writing : an autobiography / Arthur Koestler. Boston: Beacon, 1954. .