Gaya APA

Gustafson, A, L, D, A, H, V, D, V, &, D, H. (). Group Tecniques for Program Planning . : .

Gaya MLA

Gustafson, Andre, L., Delbecq,, Andrew, H., Van, De, Ven, &, David, H.. "Group Tecniques for Program Planning". : , . Text.