एपीए उद्धरण

Government of Kerala. (1970). Administration report for the year 1967-68. Port department Govt. of Kerala.

शिकागो स्टाइल उद्धरण

Government of Kerala. Administration Report for the Year 1967-68. Port department Govt. of Kerala, 1970.

एमएलए उद्धरण

Government of Kerala. Administration Report for the Year 1967-68. Port department Govt. of Kerala, 1970.