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Lua i Stíl Chicago (17ú heag.)Astuti, Khasanah Dwi, agus Indra Jaya. Rancang Bangun, Uji Coba Dan Analisis Hasil Pengukuran Instrumen Pengukur Tinggi Gelombang Permukaan Laut (Design, Testing and Results Analysis of Sea Surface Wave Height Instrument Measurement). Marine Science Department Diponegoro University, 2014.
Lua MLA (8ú heag.)Astuti, Khasanah Dwi, agus Indra Jaya. Rancang Bangun, Uji Coba Dan Analisis Hasil Pengukuran Instrumen Pengukur Tinggi Gelombang Permukaan Laut (Design, Testing and Results Analysis of Sea Surface Wave Height Instrument Measurement). Marine Science Department Diponegoro University, 2014.