Gaya APA

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

Gaya MLA

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