Gaya APA

Elich, J., Common, L, O. (1994). Precalculus / Lawrence O. Common, Joseph Elich . New York: Harper Collins College Pub..

Gaya MLA

Elich, Joseph., Common, Lawrence, O.. "Precalculus / Lawrence O. Common, Joseph Elich". New York: Harper Collins College Pub., 1994. Textbook.