Butterfield, R., Houlsby, G., & Gottardi, G. (1998). Standardized sign conventions and notation for generally loaded foundations (vol 47, pg 1051, 1997).
芝加哥风格引文Butterfield, R., G. Houlsby, 与 G. Gottardi. Standardized Sign Conventions and Notation for Generally Loaded Foundations (vol 47, Pg 1051, 1997). 1998.
MLA引文Butterfield, R., et al. Standardized Sign Conventions and Notation for Generally Loaded Foundations (vol 47, Pg 1051, 1997). 1998.
警告：这些引文格式不一定是100％准确.