Martin, H. (1988). Recreation facilities and opportunities in alpine national parks: Draft : recreational needs specifications, preferred settings and conflicts/compatibilities with other activities. Martin Planning & Environment Services.
Citace podle Chicago (17th ed.)Martin, Helen. Recreation Facilities and Opportunities in Alpine National Parks: Draft : Recreational Needs Specifications, Preferred Settings and Conflicts/compatibilities with Other Activities. Dickson, A.C.T.: Martin Planning & Environment Services, 1988.
Citace podle MLA (8th ed.)Martin, Helen. Recreation Facilities and Opportunities in Alpine National Parks: Draft : Recreational Needs Specifications, Preferred Settings and Conflicts/compatibilities with Other Activities. Martin Planning & Environment Services, 1988.