APA
Prithipal Singh, University of Delhi. Faculty of Science. Department of Botany & University of Delhi. Faculty of Science. Department of Botany. (1969). Compositae of Delhi-A reinvestigation. : .
Chicago
Prithipal Singh, University of Delhi. Faculty of Science. Department of Botany and University of Delhi. Faculty of Science. Department of Botany. 1969. Compositae of Delhi-A reinvestigation. : .
Harvard
Prithipal Singh, University of Delhi. Faculty of Science. Department of Botany and University of Delhi. Faculty of Science. Department of Botany. (1969). Compositae of Delhi-A reinvestigation. : .
MLA
Prithipal Singh, University of Delhi. Faculty of Science. Department of Botany and University of Delhi. Faculty of Science. Department of Botany. Compositae of Delhi-A reinvestigation. : . 1969.
