Citace podle APA (7th ed.)
Langford, M. (1973). Visual aids and photograpy in education: A visual aids manual for teachers and learners.
Citace podle Chicago (17th ed.)
Langford, Michael. Visual Aids and Photograpy in Education: A Visual Aids Manual for Teachers and Learners. 1973.
Citace podle MLA (9th ed.)
Langford, Michael. Visual Aids and Photograpy in Education: A Visual Aids Manual for Teachers and Learners. 1973.
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