1.
Clifford, N.J., Holloway, S.L., Rice, S.P., Valentine, G.: Key concepts in geography. SAGE, Los Angeles (2009).
2.
Clifford, N.J., Holloway, S.L., Rice, S.P., Valentine, G.: Key concepts in geography. SAGE, Los Angeles (2009).
3.
Kneale, P.E.: Study skills for geography, earth and environmental science students. Hodder Education, London (2011).
4.
GREGORY, D.: The everywhere war. The Geographical Journal. 177, 238–250 (2011). https://doi.org/10.1111/j.1475-4959.2011.00426.x.