Anderson, V., & Johnson, L. (1997). Systems thinking basics: From concepts to causal loops. Pegasus Communications.
Chicago-čujuhus (17. p.)Anderson, Virginia, juo Lauren Johnson. Systems Thinking Basics: From Concepts to Causal Loops. Waltham: Pegasus Communications, 1997.
MLA-čujuhus (9. p.)Anderson, Virginia, juo Lauren Johnson. Systems Thinking Basics: From Concepts to Causal Loops. Pegasus Communications, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.