APA-ийн эшлэл(7 дахь хэвлэлт)

Engstrom, T. W. (1985). The fine art of friendship: Building and maintaining quality relationships. Thomas Nelson.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Engstrom, Ted W. The Fine Art of Friendship: Building and Maintaining Quality Relationships. Nashville: Thomas Nelson, 1985.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Engstrom, Ted W. The Fine Art of Friendship: Building and Maintaining Quality Relationships. Thomas Nelson, 1985.