Gaya APA

Libby, J, R., Swanson, C, P. (1977). Modern prestressed concrete design principles and construction methods . New York: New York: Van Nostrand Reinhold Co.; 1977.

Gaya MLA

Libby, James, R.., Swanson, Carl, P.. "Modern prestressed concrete design principles and construction methods". New York: New York: Van Nostrand Reinhold Co.; 1977, 1977. Text.