Citace podle APA (7th ed.)

Friis, R. H. (2015). Occupational health and safety for the 21st century. Jones & Bartlett Learning.

Citace podle Chicago (17th ed.)

Friis, Robert H. Occupational Health and Safety for the 21st Century. Burlington, Massachusetts: Jones & Bartlett Learning, 2015.

Citace podle MLA (9th ed.)

Friis, Robert H. Occupational Health and Safety for the 21st Century. Jones & Bartlett Learning, 2015.

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