The Phytophthora ramorum reference sequence (RefSeq) genome is provided by the NCBI. It is a curated copy of the genome sequence submitted to GenBank. For additional information, please see the RefSeq Chapter in the NCBI Handbook.
It is recommended to cite the accession numbers that are assigned to data submissions, e.g. the GenBank, WGS or SRA accession numbers. If individual BioProjects need to be referenced, state that "The data have been deposited with links to BioProject accession number PRJNA1149793 in the NCBI BioProject database (https://www.ncbi.nlm.nih.gov/bioproject/)."