APA (7th ed.) Zitazioa
Riber, J. Yellow Card: Sex, soccer and life's little secrets.... Media for Development Trust.
Chicago Style (17th ed.) Zitazioa
Riber, John. Yellow Card: Sex, Soccer and Life's Little Secrets.... Harare, Zimbabwe: Media for Development Trust.
MLA (9th ed.) Zitazioa
Riber, John. Yellow Card: Sex, Soccer and Life's Little Secrets.... Media for Development Trust.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.