APA-ийн эшлэл(7 дахь хэвлэлт)

(1979). The Group problem solving process: Studies of a valence model / edited by L. Richard Hoffman.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

The Group Problem Solving Process: Studies of a Valence Model / Edited by L. Richard Hoffman. 1979.

MLA -ийн эшлэл (9 дэх хэвлэлт)

The Group Problem Solving Process: Studies of a Valence Model / Edited by L. Richard Hoffman. 1979.