Cita APA (7th ed.)

Evans, I. O. (1959). The observer's book of flags: By I.O. Evans (Reprint.). Warne.

Cita Chicago (17th ed.)

Evans, Idrisyn Oliver. The Observer's Book of Flags: By I.O. Evans. Reprint. London [u.a.]: Warne, 1959.

Cita MLA (8th ed.)

Evans, Idrisyn Oliver. The Observer's Book of Flags: By I.O. Evans. Reprint. Warne, 1959.