APA Style
PLAYFAIR, WILLIAM L.. (1991, 1991).
USEFUL LIFE, THE ( Cetak ke: 2).
WESTCHESTER, ILLINOIS:
CROSSWAY BOOKS.
Chicago Style
PLAYFAIR, WILLIAM L..
USEFUL LIFE, THE.
Cetak ke: 2
WESTCHESTER, ILLINOIS:
CROSSWAY BOOKS,
1991, 1991.
Text.
MLA Style
PLAYFAIR, WILLIAM L..
USEFUL LIFE, THE.
Cetak ke: 2
WESTCHESTER, ILLINOIS:
CROSSWAY BOOKS,
1991, 1991.
Text.
Turabian Style
PLAYFAIR, WILLIAM L..
USEFUL LIFE, THE.
Cetak ke: 2
WESTCHESTER, ILLINOIS:
CROSSWAY BOOKS,
1991, 1991.
Print.