Rachmawati, A. C., H. Purnaweni, and P. E. Soesanta. “Economic Valuation of Senjoyo Spring Nature Tourism Using Travel Cost Method and Willingness to Pay : JEL Classification: Q51; Q26; Z32; H41; R11.”. Journal La Bisecoman, Vol. 7, no. 4, Sept. 2026, pp. 884-03, doi:10.37899/journallabisecoman.v7i4.5991.