Gaya APA

Billings, M, P. (1960). Structural Geology (Cet.2). New Jersey: Prantice-Hall, INC., Englewood Cliffs, N. J..

Gaya MLA

Billings, Marland, P. "Structural Geology". Cet.2 New Jersey: Prantice-Hall, INC., Englewood Cliffs, N. J., 1960. Text.