Hall, D., Hammond, C., Miller, S., & Swetik , P. (1992). Level i stability analysis (LISA) documenatation for version 2.0. United States Department of Agriculture.
Chicago-referens (17:e uppl.)Hall, David, Carol Hammond, Stanley Miller, och Paul Swetik. Level I Stability Analysis (LISA) Documenatation for Version 2.0. Washington: United States Department of Agriculture, 1992.
MLA-referens (9:e uppl.)Hall, David, et al. Level I Stability Analysis (LISA) Documenatation for Version 2.0. United States Department of Agriculture, 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.