Stålhammar, S., & Pedersen, E. (2017). Recreational cultural ecosystem services: How do people describe the value? Ecosystem services, 26, 1-9. https://doi.org/10.1016/j.ecoser.2017.05.010
Citácia podle Chicago (17th ed.)Stålhammar, Sanna, a Eja Pedersen. "Recreational Cultural Ecosystem Services: How Do People Describe the Value?" Ecosystem Services 26 (2017): 1-9. https://doi.org/10.1016/j.ecoser.2017.05.010.
Citácia podľa MLA (8th ed.)Stålhammar, Sanna, a Eja Pedersen. "Recreational Cultural Ecosystem Services: How Do People Describe the Value?" Ecosystem Services, vol. 26, 2017, pp. 1-9, https://doi.org/10.1016/j.ecoser.2017.05.010.
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