Cita APA (7a ed.)

Bullard, O., & Lowe, D. (1974). Short trips and trails: The Columbia Gorge. Touchstone Press.

Cita Chicago Style (17a ed.)

Bullard, Oral, y Don Lowe. Short Trips and Trails: The Columbia Gorge. Beaverton: Touchstone Press, 1974.

Cita MLA (8a ed.)

Bullard, Oral, y Don Lowe. Short Trips and Trails: The Columbia Gorge. Touchstone Press, 1974.

Precaución: Estas citas no son 100% exactas.