Harlen, W. (2000). The teaching of science in primary schools (3rd ed.). David Fulton.
Čikaški stil citiranja (17. izdanje)Harlen, Wynne. The Teaching of Science in Primary Schools. 3rd ed. London: David Fulton, 2000.
MLA način citiranja (8. izdanje)Harlen, Wynne. The Teaching of Science in Primary Schools. 3rd ed. David Fulton, 2000.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.