APA
(1968). STANDARD LETTERS &NUMERALS OF DIFFERENT HEIGHTS FORME ON HIGHWAY SIGNS. : INDIAN ROADS CONGRESS.
Chicago
1968. STANDARD LETTERS &NUMERALS OF DIFFERENT HEIGHTS FORME ON HIGHWAY SIGNS. : INDIAN ROADS CONGRESS.
Harvard
(1968). STANDARD LETTERS &NUMERALS OF DIFFERENT HEIGHTS FORME ON HIGHWAY SIGNS. : INDIAN ROADS CONGRESS.
MLA
STANDARD LETTERS &NUMERALS OF DIFFERENT HEIGHTS FORME ON HIGHWAY SIGNS. : INDIAN ROADS CONGRESS. 1968.