APA

Helfer L. O. R., . (2017). The World Blind Union Guide to the Marrakesh Treaty. : Oxford University PressOxford University Press.

Chicago

Helfer Land Okediji Reichman, . 2017. The World Blind Union Guide to the Marrakesh Treaty. : Oxford University PressOxford University Press.

Harvard

Helfer L. O. R., . (2017). The World Blind Union Guide to the Marrakesh Treaty. : Oxford University PressOxford University Press.

MLA

Helfer Land Okediji Reichman, . The World Blind Union Guide to the Marrakesh Treaty. : Oxford University PressOxford University Press. 2017.