Gaya APA

Alexander, L. (1975). Developing Skills : an integrated course for intermediate students (New Concept English) (Edisi 1). Kabupaten Sleman: PT. Kanisius.

Gaya MLA

Alexander, L.G.. "Developing Skills : an integrated course for intermediate students (New Concept English)". Edisi 1 Kabupaten Sleman: PT. Kanisius, 1975. TEXT.