Symposium on Rapid Excavation Sacramento, Calif, Sacramento State College. School of Engineering, & Hartman, H. L. (1969). Progress toward goals: Proceedings of the II symposium on rapid excavations, October 16-17, 1969. Sacramento State College.
Chicago-viite (17. p.)Symposium on Rapid Excavation Sacramento, Calif, Sacramento State College. School of Engineering, ja Howard L. Hartman. Progress Toward Goals: Proceedings of the II Symposium on Rapid Excavations, October 16-17, 1969. Sacramento: Sacramento State College, 1969.
MLA-viite (8. p.)Symposium on Rapid Excavation Sacramento, Calif, et al. Progress Toward Goals: Proceedings of the II Symposium on Rapid Excavations, October 16-17, 1969. Sacramento State College, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.