Gaya APA
Irwin, . (1995).
Engineering economy applying theory to practice/Irwin (^a1 ^bJilid 1).
London:
^aprnted n the United staes of Aerica.
Gaya MLA
Irwin, .
"Engineering economy applying theory to practice/Irwin".
^a1 ^bJilid 1
London:
^aprnted n the United staes of Aerica,
1995.
Text.