Caper, Robert
Building out into the dark : theory and observation in science and psychoanalysis
Routledge, Taylor & Francis Group, 2009
Buku Teks
Allwright, Dick
Observation in the language classroom
Longman, 1993
Buku Teks SO
Podmore, Valerie N.
Observation: origins and approaches in early childhood
McGraw-Hill, 2012
Buku Teks
Issues in participant observation : a text and reader
edited by George J. McCall, J.L. Simmons.
Random House, 1969
Buku Teks SO
Observation on the feeding of Nudibranch Phyllidia varicosa Lamarck, 1801 on the sponge Axinyssa cf. aculeata Wilson, 1925 in coral reefs of Pramuka Island, Thousand Island National Park, Indonesia
Lembaga Penelitian Universitas Indonesia, 2003
Artikel Jurnal