| Logo | Offer | Minimal level | Rates |
|---|---|---|---|
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Rating ЛитресRussia, Azerbaijan, Armenia, Belarus, Kazakhstan etc. |
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 |
Rating Casa e Vídeo - CPABrazil |
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 |
Rating Издательство Манн, Иванов и ФерберRussia |
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 |
Rating AlpinabookRussia |
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 |
Rating Exclusive Learncafe - Cursos online pra você! Brazil |
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 |
Rating РеспубликаRussia |
