Gaya APA
Collins, G, R. (1992).
You Can Make A Difference : 14 Principles For Influencing Lives .
Grand Rapids:
Zondervan Publishing House.
Gaya MLA
Collins, Gary, R.
"You Can Make A Difference : 14 Principles For Influencing Lives".
Grand Rapids:
Zondervan Publishing House,
1992.
Text.