APA-ийн эшлэл(7 дахь хэвлэлт)

Butterfield, R., Houlsby, G., & Gottardi, G. (1998). Standardized sign conventions and notation for generally loaded foundations (vol 47, pg 1051, 1997).

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Butterfield, R., G. Houlsby, ба G. Gottardi. Standardized Sign Conventions and Notation for Generally Loaded Foundations (vol 47, Pg 1051, 1997). 1998.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Butterfield, R., et al. Standardized Sign Conventions and Notation for Generally Loaded Foundations (vol 47, Pg 1051, 1997). 1998.