പി കെ നാരായണപിള്ള & P K Narayanapilla. (1967). ചിന്താരത്നം (1st.). National Book Stall.
Citação norma Chicagoപി കെ നാരായണപിള്ള and P K Narayanapilla. ചിന്താരത്നം. 1st. Kottayam: National Book Stall, 1967.
Citação norma MLAപി കെ നാരായണപിള്ള and P K Narayanapilla. ചിന്താരത്നം. 1st. National Book Stall, 1967.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.