Appraisal Journal. Appraisal Institute.
Chicago Style (17th ed.) ZitazioaAppraisal Journal. Appraisal Institute.
MLA (9th ed.) ZitazioaAppraisal Journal. Appraisal Institute.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA (7th ed.) Zitazioa