Cita APA (7th ed.)

WEIR, C. (1977). XERTICAL ASCEN ADVENTURES OF HELICOPTER PILOT. HARCOURT BRACE.

Cita Chicago (17th ed.)

WEIR, CHARLES. XERTICAL ASCEN ADVENTURES OF HELICOPTER PILOT. CANADA: HARCOURT BRACE, 1977.

Cita MLA (9th ed.)

WEIR, CHARLES. XERTICAL ASCEN ADVENTURES OF HELICOPTER PILOT. HARCOURT BRACE, 1977.