Leonard W Van Os & H J L Van Os. (1999). Afrikaans self taught: By the natural method with phonetic pronunciation (Thimm's system). Asian Educational Services.
Chicago Edition CitationLeonard W Van Os and H J L Van Os. Afrikaans Self Taught: By the Natural Method with Phonetic Pronunciation (Thimm's System). New Delhi: Asian Educational Services, 1999.
MLA Edition CitationLeonard W Van Os and H J L Van Os. Afrikaans Self Taught: By the Natural Method with Phonetic Pronunciation (Thimm's System). Asian Educational Services, 1999.
Warning: These citations may not always be 100% accurate.