Abidin, Zainal and Efendi, Irwan and Gultom, Dame Trully (2023) Assessing Willingness to Pay for Improved Water Services from Forest Area in Bayas Jaya Village, Lampung Province. 4th International Conference in Agroforestry 2022, 1145 (012013). pp. 1-11.

Abidin, Zainal and Efendi, Irwan and Gultom, Dame Trully (2023) Similarity test IOP COnference 2023 assessing willingness to pay zainal irwan dan dame. IOP Conf. Series: Earth and Environmental Science.

Abidin, Zainal and Efendi, Irwan and Gultom, Dame Trully (2022) ANALISIS KESEDIAAN MEMBAYAR JASA AIR BERSIH DI DESA BAYAS JAYA, KECAMATAN WAY KHILAU, KABUPATEN PESAWARAN. Technical Report. LPPM Universitas Lampung. (Unpublished)

Dermawan, Imam Sugiharto and Efendi, Irwan and Rangga, Kordiyana (2019) PERANAN FIELD OFFICER PT VASHAM KOSA SEJAHTERA DALAM PROGRAM KEMITRAAN DENGAN PETANI JAGUNG DI KECAMATAN KETAPANG KABUPATEN LAMPUNG SELATAN. Peranan Field Officer PT Vasham Kosa Sejahtera Dalam Program Kemitraan Dengan Petani Jagung di Kecamatan Ketapang Kabupaten Lampung Selatan, 7 (2). pp. 242-246.