fulltext bisa diunduh di https://www.mdpi.com/books/pdfview/book/1218 https://doi.org/10.3390/books978-3-03897-739-1
fulltext bisa diunduh dari https://www.mdpi.com/books/pdfview/book/128 DOI https://doi.org/10.3390/books978-3-906980-70-6
fulltext bisa diunduh dari https://library.oapen.org/bitstream/handle/20.500.12657/32039/619590.pdf;jsessionid=14F18A8EBD5F0348623EA98771324D19?sequence=1 DOI: 10.5117/9789462980914
fulltext dapat diunduh dari https://library.oapen.org/bitstream/handle/20.500.12657/32028/619809.pdf?sequence=1 DOI: 10.5117/9789462984493
fulltext bisa diunduh dari https://library.oapen.org/bitstream/handle/20.500.12657/22273/9789048543137.pdf?sequence=1 DOI: 10.5117/9789463722902
fullltext dapat diunduh dari https://library.oapen.org/bitstream/handle/20.500.12657/31843/624771.pdf?sequence=1 DOI: 10.5117/9789462981362 DOI: 10.5117/9789462981362
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fulltext dapat diunduh di https://library.oapen.org/bitstream/handle/20.500.12657/39371/9789048537419.pdf?sequence=1
Buku dapat diakses secara bebas (Open Access) melalui https://www.degruyter.com/view/title/534799 https://doi.org/10.1515/9783110574432