S. Changtragoon. 1996. Patterns of genetic variation and characterisation of the mating system of Pinus merkusii in Thailand. Bangkok:Royal Forest Department;
S. Changtragoon. (1996) Patterns of genetic variation and characterisation of the mating system of Pinus merkusii in Thailand (รายงานผลงานวิจัย). Royal Forest Department:Bangkok.
S. Changtragoon. Patterns of genetic variation and characterisation of the mating system of Pinus merkusii in Thailand. Bangkok:Royal Forest Department, 1996.
S. Changtragoon. (1996) Patterns of genetic variation and characterisation of the mating system of Pinus merkusii in Thailand (รายงานผลงานวิจัย). Royal Forest Department:Bangkok.