Gaya APA
Singer, F, L., Pytel, A. (1981).
Kunci/Jawaban Soal-Soal Kekuatan Bahan (Strength Of Material) (3).
Jakarta:
Erlangga.
Gaya MLA
Singer, Ferdinand, L.., Pytel, Andrew.
"Kunci/Jawaban Soal-Soal Kekuatan Bahan (Strength Of Material)".
3
Jakarta:
Erlangga,
1981.
Text.