Cita APA (7a ed.)

Quesada, F. B. (1976). The mechanics and economics of tourism. s.n.].

Cita Chicago Style (17a ed.)

Quesada, Francisco B. The Mechanics and Economics of Tourism. [S.l: s.n.], 1976.

Cita MLA (9a ed.)

Quesada, Francisco B. The Mechanics and Economics of Tourism. s.n.], 1976.