Amazon
| № | Страна магазина / Country | Название произведения / Title | Формат произведения / Format |
| 1 | United States | Methods of concentration | eBook (kindle) |
| 2 | United States | Methods of concentration | печатная (paper) |
| 3 | United Kingdom | Methods of concentration | eBook (kindle) |
| 4 | United Kingdom | Methods of concentration | печатная (paper) |
| 5 | Germany | Methods of concentration | eBook (kindle) |
| 6 | Germany | Methods of concentration | печатная (paper) |
| 7 | France | Methods of concentration | eBook (kindle) |
| 8 | France | Methods of concentration | печатная (paper) |
| 9 | Spain | Methods of concentration | eBook (kindle) |
| 10 | Spain | Methods of concentration | печатная (paper) |
| 11 | Italy | Methods of concentration | eBook (kindle) |
| 12 | Italy | Methods of concentration | печатная (paper) |
| 13 | Japan | Methods of concentration | eBook (kindle) |
CreateSpace
| № п/п | Название произведения / Title | Формат произведения / Format |
| 1 | Methods of concentration | печатная (paper) |