Gaya APA

Porter, D.M.. (1979). Critical Loads of Built-up Columns and a Pocket Calculator Program . : s.n..

Gaya Chicago

Porter, D.M.. Critical Loads of Built-up Columns and a Pocket Calculator Program. : s.n., 1979. Computer Software.

Gaya MLA

Porter, D.M.. Critical Loads of Built-up Columns and a Pocket Calculator Program. : s.n., 1979. Computer Software.

Gaya Turabian

Porter, D.M.. Critical Loads of Built-up Columns and a Pocket Calculator Program. : s.n., 1979. Computer Software.