Which of the Following Is the Correct APA Citation for the Following

Which of the following is the correct APA citation for the following single-authored book?
Author: Richard T. Walls
Title: Psychological Foundations of Learning
Year: 1999
Publisher: West Virginia University Press
School Affiliation: West Virginia University City: Morgantown
State: West Virginia
Topic: Learning Theories
# of pages: 198

A) Walls, Richard.T.(1999) .Psychological foundations of learning.Morgantown, WV: West Virginia University Press.
B) Walls, R.T.(1999) .Psychological foundations of learning.Morgantown, WV: West Virginia University Press.
C) Walls, Richard.T.(1999) .Psychological Foundations of Learning.Morgantown, WV: West Virginia University Press.
D) Walls, R.T.(1999) .Psychological Foundations of Learning.Morgantown, WV: West Virginia University Press.