APA
Singh & Others, . (1977). Moden chemistry XI. Allahabad: Kitab Mahal.
Chicago
Singh & Others, . 1977. Moden chemistry XI. Allahabad: Kitab Mahal.
Harvard
Singh & Others, . (1977). Moden chemistry XI. Allahabad: Kitab Mahal.
MLA
Singh & Others, . Moden chemistry XI. Allahabad: Kitab Mahal. 1977.