Yasman
Sebaran Vertical Nudibranchia (Mollusca: Gastropoda) di Terumbu Karang-Karang Lebar, Pulau Semak Daun Taman Nasional Laut Kepulauan Seribu dan Catatan Pertama (First Record) Pengamatan Pemangsaan Phyllidia Varicosa Lamarck, 1801 terhadap Sponge Axinyssa Cf. Aculeaia Wilson 1925
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2002
 UI - Laporan Penelitian
Issues in participant observation : a text and reader
edited by George J. McCall, J.L. Simmons.
Random House, 1969
 Buku Teks
Podmore, Valerie N.
Observation: origins and approaches in early childhood
McGraw-Hill, 2012
 Buku Teks
Caper, Robert
Building out into the dark : theory and observation in science and psychoanalysis
Routledge, Taylor & Francis Group, 2009
 Buku Teks
Approaches to ethnography : analysis and representation in participant observation
edited by Colin Jerolmack and Shamus Khan
Oxford University Press, 2018
 Buku Teks