Tactay, P. B. (1970). Potential economic survey of La Union with focus on cottage industries and tourism: Fieldwork report. Institute for Small-Scale Industries, University of the Philippines.
Lua i Stíl Chicago (17ú heag.)Tactay, Perfecta B. Potential Economic Survey of La Union with Focus on Cottage Industries and Tourism: Fieldwork Report. Quezon City: Institute for Small-Scale Industries, University of the Philippines, 1970.
Lua MLA (9ú heag.)Tactay, Perfecta B. Potential Economic Survey of La Union with Focus on Cottage Industries and Tourism: Fieldwork Report. Institute for Small-Scale Industries, University of the Philippines, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.