Gaya APA
Powlison, D., Yenchko, J. (2000).
Pre-Engagement : 5 Questions to Ask Yourselves .
Phillipsburg, New Jersey, USA:
P & R Publishing.
Gaya MLA
Powlison, David., Yenchko, John.
"Pre-Engagement : 5 Questions to Ask Yourselves".
Phillipsburg, New Jersey, USA:
P & R Publishing,
2000.
Academic.