APA
TRAVANCORE RUBBERS LIMITED, TRAVANCORE RUBBERS LIMITED, . (1990). 53rd Annual report 1989-90. Kottayam: Travancore Rubbers Limited.
Chicago
TRAVANCORE RUBBERS LIMITED, TRAVANCORE RUBBERS LIMITED, . 1990. 53rd Annual report 1989-90. Kottayam: Travancore Rubbers Limited.
Harvard
TRAVANCORE RUBBERS LIMITED, TRAVANCORE RUBBERS LIMITED, . (1990). 53rd Annual report 1989-90. Kottayam: Travancore Rubbers Limited.
MLA
TRAVANCORE RUBBERS LIMITED, TRAVANCORE RUBBERS LIMITED, . 53rd Annual report 1989-90. Kottayam: Travancore Rubbers Limited. 1990.
