Λιγγρής, Ν., & Βέμπερ, Κ. (1989). Ωmega english learner's dictionary: For speaker's of greek. [Athens]: Ωmega ELT Publications.
استشهاد بنمط شيكاغوΛιγγρής, Νίκος, و Κλειώ Βέμπερ. Ωmega English Learner's Dictionary: For Speaker's of Greek. [Athens]: Ωmega ELT Publications, 1989.
MLA استشهادΛιγγρής, Νίκος, و Κλειώ Βέμπερ. Ωmega English Learner's Dictionary: For Speaker's of Greek. [Athens]: Ωmega ELT Publications, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.