Gaya APA

Cordoba, D, A., Wengerd, S, A. (1969). Guidebook of the Border Region . Mexico: New Mexico Geoogial Society.

Gaya MLA

Cordoba, Diego, A.., Wengerd, Sherman, A.. "Guidebook of the Border Region". Mexico: New Mexico Geoogial Society, 1969. Buku TP.