Gaya APA
Spiegel, L. (2004).
(PASCA - TEKNIK SIPIL) Applied Statics and Strength of Materials (Edisi 4).
New Jersey:
Prentice Hall International.
Gaya MLA
Spiegel, Leonard.
"(PASCA - TEKNIK SIPIL) Applied Statics and Strength of Materials".
Edisi 4
New Jersey:
Prentice Hall International,
2004.
.