APA Style
Riggs, J, L.
(1977).
Engineering economics / James L. Riggs
(
1)
.
New York:
McGraw-Hill.
MLA Style
Riggs, James, L..
"Engineering economics / James L. Riggs".
1
New York:
McGraw-Hill,
1977.
Textbook ห้องสมุดทั่วไป.