Gaya APA
Til, E, J, V. (1991).
Nonprofit and voluntary sector quaterly volume 20 number 3 .
San Francisco:
Jossey-Bass Publisher.
Gaya MLA
Til, Ed., Jon, Van.
"Nonprofit and voluntary sector quaterly volume 20 number 3".
San Francisco:
Jossey-Bass Publisher,
1991.
Text.