Παραπομπή APA

ISI. (1972). Indian standard guide for selection of type and page layout in text books. Indian standards Institution.

Παραπομπή Chicago Style

ISI. Indian Standard Guide for Selection of Type and Page Layout in Text Books. London: Indian standards Institution, 1972.

Παραπομπή MLA

ISI. Indian Standard Guide for Selection of Type and Page Layout in Text Books. Indian standards Institution, 1972.