APA

Wickham G., Tiedeman H. & Skinner E. (1972). Support determinations based on geologic predictions. New York: Proceedings of the 1st North American Rapid Excavation Conference.

Chicago

Wickham GE, Tiedeman HR and Skinner EH. 1972. Support determinations based on geologic predictions. New York: Proceedings of the 1st North American Rapid Excavation Conference.

Harvard

Wickham G., Tiedeman H. and Skinner E. (1972). Support determinations based on geologic predictions. New York: Proceedings of the 1st North American Rapid Excavation Conference.

MLA

Wickham GE, Tiedeman HR and Skinner EH. Support determinations based on geologic predictions. New York: Proceedings of the 1st North American Rapid Excavation Conference. 1972.