എ൯ പി പുന്തല കൊട്ടാരക്കര & N P Punthala Kottarakkara. (1954). ശോകമുദ്ര (1st.). Sree Narasimhavilasam Book Depot.
Citação norma Chicagoഎ൯ പി പുന്തല കൊട്ടാരക്കര and N P Punthala Kottarakkara. ശോകമുദ്ര. 1st. Thuravur: Sree Narasimhavilasam Book Depot, 1954.
Citação norma MLAഎ൯ പി പുന്തല കൊട്ടാരക്കര and N P Punthala Kottarakkara. ശോകമുദ്ര. 1st. Sree Narasimhavilasam Book Depot, 1954.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.