APA-viite (7. p.)

Nielsen, H. G. (2021). Outdoor Recreation: Physiological and Psychological Effects on Health. IntechOpen.

Chicago-viite (17. p.)

Nielsen, Hilde G. Outdoor Recreation: Physiological and Psychological Effects on Health. IntechOpen, 2021.

MLA-viite (9. p.)

Nielsen, Hilde G. Outdoor Recreation: Physiological and Psychological Effects on Health. IntechOpen, 2021.

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