Gregory, J., & Thacker, R. (1987). Audiovisual resources in occupational health and safety: Films, videos and tape slides available from distributors in the United Kingdom. Health and Safety Executive.
Citace podle Chicago (17th ed.)Gregory, Jill, a Rosemary Thacker. Audiovisual Resources in Occupational Health and Safety: Films, Videos and Tape Slides Available from Distributors in the United Kingdom. Sheffield: Health and Safety Executive, 1987.
Citace podle MLA (9th ed.)Gregory, Jill, a Rosemary Thacker. Audiovisual Resources in Occupational Health and Safety: Films, Videos and Tape Slides Available from Distributors in the United Kingdom. Health and Safety Executive, 1987.
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