Gaya APA

Sleezer, C, M. et al (2014). A Practical Guide to Needs Assessment, Third Edition (Third Edition). San Fransisco: John Wiley & Sons, Inc.

Gaya MLA

Sleezer, Catherine, M.. et al. "A Practical Guide to Needs Assessment, Third Edition". Third Edition San Fransisco: John Wiley & Sons, Inc, 2014. Book.