The document discusses different methods of collecting primary and secondary data. It describes primary data collection methods such as observation, interviews using questionnaires/schedules, and surveys. It provides details on structured vs unstructured observation, participant vs non-participant observation, and structured vs unstructured interviews. It also discusses advantages and limitations of interviews and questionnaires. Secondary data collection involves obtaining published data from various sources such as government publications, books, reports, and public records. When using secondary data, the researcher must evaluate the reliability, suitability, and adequacy of the data.