APA Style
Samuelson, P, A., Nordhaus, W, D.
(2005).
Economics
(
18th)
.
Boston:
McGraw-Hill/Irwin.
MLA Style
Samuelson, Paul, A.., Nordhaus, William, D..
"Economics".
18th
Boston:
McGraw-Hill/Irwin,
2005.
Books.