Gaya APA

Erftemeijer, P., Lambert, F. (1988). Report on a visit to Pulau Rambut, January 1988 (unpublished) . : AWB.

Gaya MLA

Erftemeijer, P.L.A.., Lambert, F.R.. "Report on a visit to Pulau Rambut, January 1988 (unpublished)". : AWB, 1988. Text.