Gaya APA
DEGARMO,E.Paul, . (1997).
Ekonomi Teknik - Engineering Economy Tenth Edition Jilid 1 (10).
Jakarta,DKI:
Prenhallindo.
Gaya MLA
DEGARMO,E.Paul, .
"Ekonomi Teknik - Engineering Economy Tenth Edition Jilid 1".
10
Jakarta,DKI:
Prenhallindo,
1997.
Text.