Gaya APA

Rad, P. F.. (1976). Use of Seashells in Concrete . : s.n..

Gaya Chicago

Rad, P. F.. Use of Seashells in Concrete. : s.n., 1976. Computer Software.

Gaya MLA

Rad, P. F.. Use of Seashells in Concrete. : s.n., 1976. Computer Software.

Gaya Turabian

Rad, P. F.. Use of Seashells in Concrete. : s.n., 1976. Computer Software.