Gaya APA
Higgins, A., Elonka, S, M.
(1976).
Boiler Room Question and Answers
(
2)
.
Toronto:
McGraw Hill.
Gaya MLA
Higgins, Alex., Elonka, Stephen, Michael.
"Boiler Room Question and Answers".
2
Toronto:
McGraw Hill,
1976.
Text.