SPENCELEY, J. A. A. A. (2004). PROBLEM SOLVERS WHY NOT SHARE. KANISIUS.
Chicago Style aipamenaSPENCELEY, JANINE AMOS AND ANNABEL. PROBLEM SOLVERS WHY NOT SHARE. KANISIUS, 2004.
MLA aipamenaSPENCELEY, JANINE AMOS AND ANNABEL. PROBLEM SOLVERS WHY NOT SHARE. KANISIUS, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.