Lidz, Carol Schneider
Early childhood assessment
John Wiley & Sons, 2003
 Buku Teks
Allwright, Dick
Observation in the language classroom
Longman, 1993
 Buku Teks
Noval Saputra
Implementasi triclustering menggunakan metode &-trimax pada data ekspresi gen microarray = Triclustering implementation using &-trimax methode on microarray gene expression dataset
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2020
 UI - Skripsi (Membership)
Caper, Robert
Building out into the dark : theory and observation in science and psychoanalysis
Routledge, Taylor & Francis Group, 2009
 Buku Teks
Beaty, Janice J.
Observasi perkembangan anak usia dini
Kencana, 2013
 Buku Teks