Gaya APA
Gibbs, J. (2000).
Tribes : a new way of learning and being together / by Jeanne Gibbs .
California:
Centre Source Systems.
Gaya MLA
Gibbs, Jeanne.
"Tribes : a new way of learning and being together / by Jeanne Gibbs".
California:
Centre Source Systems,
2000.
Buku.